1. CAS Key Laboratory of Nanophotonic Materials and Devices CAS Key Laboratory of Standardization and Measurement for Nanotechnology National Center for Nanoscience and Technology Beijing 100190 (VR China
2. Physikalisches Institut Westfälische Wilhelms-Universität Wilhelm-Klemm-Straße 10 48149 Münster Deutschland
3. Center for Nanotechnology Heisenbergstraße 11 48149 Münster Deutschland
4. Organisch-Chemisches Institut Westfälische Wilhelms-Universität Corrensstraße 40 48149 Münster Deutschland
5. Institute of Physics and University of Chinese Academy of Sciences, Chinese Academy of Sciences Beijing 100190 (VR China
6. Songshan Lake Materials Laboratory Dongguan, Guangdong 523808 (VR China
7. Herbert Gleiter Institute of Nanoscience Nanjing University of Science and Technology Nanjing 210094 (VR China